Killer Medals Editor (Remove)

I'm just wondering if it's possible to make a Killer Medal Editor that removes medals instead of adding medals. Reason being that I used a Killer Challenge Unlocker back then and it added like 9 millions Kill Chain, Ultra Kill, Mega Kill, etc medals and I don't like it since it looks really bad.I want to edit it to something way less (50 or so). So can someone answer my question?